I am wondering is there any way we can record audio in an iOS app so that it don't get saved into any file because my file size is getting into GBs.
Thanks!!
If You are recording audio that means you have to save it somewhere, because it must need some space otherwise how you can record ?
You can use NSTemporaryDirectory to save your file like,
NSString *folderPath = NSTemporaryDirectory();
NSString *soundFilePath = [folderPath
stringByAppendingPathComponent:[NSString stringWithFormat: #"%.0f%#", [NSDate timeIntervalSinceReferenceDate] *1000.0, #"audio.caf"]];
NSURL *soundFileURL = [NSURL fileURLWithPath:soundFilePath];
NSLog(#"Using File called: %#",soundFileURL);
audioRecorder = [[ AVAudioRecorder alloc] initWithURL:soundFileURL settings:recordSetting error:&error];
[audioRecorder setDelegate:self];
[audioRecorder prepareToRecord];
Above is the code snippet so that you get idea!
ios automatically clears NSTemporaryDirectory when needed so it is not point of worry for you. And yes you have to store recorded audio somewhere if you want it for permanent!
You can create your own directory that can be work as temp directory that you can clear manually where needed! (create directory in document directory record file there and clear it when your task will be completed)
But you can't record without storing it!
Imagine you could -- would it be better? Keeping GBs of data in RAM?.. Sounds bad.
If you want to keep your disk space free, what you could do is:
1) Save small part of data into file (i.e. 20 MB?)
2) Send this file to backend and delete it from disk on completion
3) Repeat process until you finish recording
Related
This is strange, but basically I download and save a video locally, and the store the url path to provide to an AVPlayer to play.
This works fine the first time I do it. I download a file, and then I can play it to my hearts content as many times UNTIL I exit the app. When I launch the app a second time, I now get a black screen when I try to play the same exact video using the same exact path.
Because I am using the Simulator I can verify that the videos and pictures indeed very much still exist in the same folder I saved them to, and I can still play them if I click on them from the Finder.
Maybe it's a caching issue? If it matters, I've saved them straight to the Library directory as I test this.
Relevant Code:
NSString *outputFile = [NSString stringWithFormat:#"video_%#.mp4", guid];
NSString *outputDirectory = [NSSearchPathForDirectoriesInDomains(NSApplicationSupportDirectory, NSUserDomainMask, YES) objectAtIndex:0];
NSString *tempPath = [outputDirectory stringByAppendingPathComponent:outputFile];
NSURL *fileURL = [NSURL fileURLWithPath:tempPath];
// save the video to the URL
Then I "persist" it using an NSString [fileURL path] (The way I've built this out, assume the solution requires an NSString to NSURL conversion).
Later I create an AVPlayerItem:
NSURL *url = [NSURL fileURLWithPath:persistedObject.contentURL];
NSLog(#"url: %#", url); // prints a valid location**
AVPlayerItem *item = [AVPlayerItem playerItemWithURL:url];
** for example this is a sample url location
url: file:///Users/gabriel/Library/Developer/CoreSimulator/Devices/CE1FC933-808C-4003-9BE4-DEC59B787FF7/data/Containers/Data/Application/FAD072B4-B5B0-4487-8A76-57B047324A00/Library/picture_D8DEAFA5-0843-4AA3-BB32-C61E32D13579.mp4
It's been suggested I use URLForDirectory:inDomain:appropriateForURL:create:error: and URLByAppendingPathComponent: instead, which I will look into. But still confused as to why it would play when I first download it, but not after app exits when it's the same exact file.
You've made a classic mistake. You are persisting the full path. But the full path changes. Never persist a full path. Only persist the part of the path relative to the value obtained from NSSearchPathForDirectoriesInDomains.
Given what you are doing, you should only persist the base filename (outputFile). Then when the app starts, you rebuild the full path again like you did originally but use the persisted filename to append it to the dynamically obtained path to the application support folder.
I'm creating an app that plays back multiple videos and photos in a snapchat story fashion. I fetch each of these videos data and write it to a temp file in order to play with AVPlayer.
NSString *outputPath = [[NSString alloc] initWithFormat:#"%#%#", NSTemporaryDirectory(), [NSString stringWithFormat:#"output%i.mov", i]];
[data writeToFile:outputPath atomically:YES];
In viewWillDissapear I delete all of these files with:
NSArray* tmpDirectory = [[NSFileManager defaultManager] contentsOfDirectoryAtPath:NSTemporaryDirectory() error:NULL];
for (NSString *file in tmpDirectory) {
[[NSFileManager defaultManager] removeItemAtPath:[NSString stringWithFormat:#"%#%#", NSTemporaryDirectory(), file] error:NULL];
}
But when I look at how much memory my app is using, in settings, its around 300 mb. Is there a way to see what is actually taking up all this memory? I would think this is high since I'm not caching anything besides the currentUser data (name, profileImage).
Should I be doing something else to clean the temp files?
But this line is absolutely wrong:
[data writeToFile:outputPath atomically:YES];
The implication is that at some moment — this moment — you are holding an entire video in memory (as data). That is completely incorrect; it should never happen. You should download to a file on disk, and if necessary, write that file to another file; you should never attempt to load the entire video into memory at once.
As #peter mentioned, you can use streaming Video streaming.
Or else If you really want to download video file and store it into the disk space and want to utilize it later part then you should follow apple recommended way i.e NSFileHandle class to optimize your application heap memory while downloading larger files.
NSFileHandle
I am saving audio data to the Documents directory and trying to read it back. If I play it back immediately it plays successfully, however, if I start a new session and try and play the song locally it will fail even though listing the files in the Documents directory shows that my file is still there. Note that the file is played back from the Documents folder in the same way (same code) if it is played immediately or during a new session.
Here is how I save the audio data to the Documents directory:
+(void)writeDataToAudioFile:(NSData*)data forTrack:(MediaItem*)track
{
// filename looks like "[track_id].mp3"
NSString *fileName = [NSString stringWithFormat:#"%#.%#",track.sc_id,track.original_format];
NSString *pathName = [[NSSearchPathForDirectoriesInDomains(NSDocumentDirectory,
NSUserDomainMask,
YES) firstObject]
stringByAppendingPathComponent:fileName];
[[NSFileManager defaultManager] createFileAtPath:pathName
contents:data
attributes:nil];
}
Then in my music player I want to load the local URL to this file to initialize the AVPlayer:
NSURL *url;
if(_currentTrack.is_local_item)
{
url = [NSURL fileURLWithPath:_currentTrack.local_file_path];
}
url does not get created properly as AVPlayer does not play. Furthermore, I have tried every different way to load the file as data into an NSData object to check the byte size but trying to access the file as data always returns nil. However, the file exists as if I use NSFileManager I am able to iterate over the items in the Documents directory and print their file names/paths, validating that I the path I have saved in "_currentTrack.local_file_path" does exist. Again, if I play the file immediately after saving the file to disk it will play back.
If there is more info I can provide to make this clearer I will. Thank you very much.
Do not write the full directory path to DB. It will change. You need to only save the file name to DB as reference. Then use as follows:
NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
NSString *documentsPath = [paths objectAtIndex:0];
NSString *fileName = #"SAVED_FILE_NAME.mp3"; // eg: [track_id].mp3
NSString *filePath = [documentsPath stringByAppendingPathComponent:fileName];
This will provide you the actual path of the file.
Keep coding........... :)
I found the solution after putting the problem down for a few days. I break-pointed and print-stated the heck out of the program and I found that the file path I was saving was not the same as the file path of the file.
I think this was a simulator issue, as the issue only occurred between different sessions of the simulator, and worked within the same session, so the device id (which is part of the absolute path) was changing - maybe someone more knowledgeable can weigh in on that.
Pay closer attention to the string values of your variables folks!
I am working on a project where I need to manage videos. I need to rename or delete video. For that we need to hold the video in NSDATA and then manage it.
But I am getting an error message as Terminated due to memory error on below statement.
Edited
NSData *data=[NSData dataWithContentsOfFile:self.path];
if (data){
BOOL success = [data writeToFile:videopath atomically:NO];
}
self.path contains the path of video file. It works in small size video (of 4-10 mins) But it crashes in large size video (bigger than 20-30 mins).
Please advice.
Use this code instead loading the video file to memory, Your code will work with small files but u gonna fail with big files.
if ( [[NSFileManager defaultManager] isReadableFileAtPath:source] ){
[[NSFileManager defaultManager] copyItemAtURL:source toURL:destination error:nil];}
You are maintaing the full video as NSData inside the application. Instead of using a Video file as NSData, copy the video to some where (e.g NSTempoaryDirectoy). You can delete or rename the Old video.
I am not sure what the requirement for you. from your question I understood that you need to rename your video file. for renaming, why we need to go for reading it as NSdata and again writing the same. for Renaming try the below code.
NSFileManager *filemanager = [NSFileManager defaultManager];
if ([filemanager fileExistsAtPath:filePath])
{
NSString *target = [[filePath stringByDeletingLastPathComponent] stringByAppendingPathComponent:newnameofthefile];
[filemanager moveItemAtPath:filePath toPath:target error:nil];
}
I hope this may help you..
This is my first real project. I have an app that captures several seconds of video using AVFoundation, outputs this to a file in the documents directory and lets the user preview the video before they upload it using HTTP and a PHP script on my website.
All the video capture and preview work perfectly but I am stuck on uploading the video file.
I learnt a lot from this simpleSDK video which shows how to achieve the desired effect using a video file stored in the apps main bundle.
The code from the tutorial that set up videoData ready to upload originally looked like this:
NSData *videoData = [NSData dataWithContentsOfFile:[[NSBundle mainBundle] pathForResource:#"Movie" ofType:#"mov"]];
NSString *urlString = #"http://www.iphonedevnation.com/video-tutorial/upload.php";
The filename of the video file that I need to upload is always unique and generated using CFUUIDCreateString. I join this string to the path for the documents directory, add ".mov" to the end of it and save it into a text file for retrieving later.
This all works as I am able to retrieve the filename from the file and use it to preview the movie clip elsewhere in the app.
My path is in an NSString, that I have tried converting to NSURL and removing the file suffix to get it to work with the NSData *videoData.........line but it doesn't compile, I get an "No known class method for selector 'dataWithContentsOfFile:ofType.' error. I am targeting iOS 5 and using Xcode 4.3 with ARC and Storyboards.
I've been at this for best part of 5 hours now so hopefully someone can help. My code, which included tips from elsewhere on converting from a NSString to NSURL follows:
NSString *content = [[NSString alloc] initWithContentsOfFile:lastSavedTalentFilenamePath
usedEncoding:nil
error:nil];
NSLog(#"content=%#",content);
//Need to now remove the '.mov' file type identifier
NSString *shortContent= [content substringToIndex:[content length]-4];
NSLog(#"***************shortContent***************%#", shortContent);
NSURL *convertedContent = [NSURL fileURLWithPath:shortContent];
NSLog(#"***************convertedContent***********%#",convertedContent);
NSData *videoData = [NSData dataWithContentsOfFile:convertedContent ofType:#"mov"];];
There is no NSData method called dataWithContentsOfFile:ofType:
The methods available are:
+ dataWithContentsOfFile:
+ dataWithContentsOfFile:options:error:
both of which take the file location as an NSString so there's not need to convert to an NSURL